基于混杂系统拉索振动控制的参数分析及效率对比
发布时间：2018-12-14 07:23
【摘要】：拉索的风致振动会对大跨度斜拉桥的施工和正常运营产生较大危害和安全隐患,为了解决拉索这个典型的风致振动问题,本论文对斜拉索的振动控制以及振动机理进行研究与探索。论文首先从风致振动危害和拉索阻尼器减振效果入手,引出混杂系统控制理论,然后在混杂系统理论研究基础上建立了拉索阻尼器半主动控制的混合逻辑动态模型,并对此模型进行了数值仿真分析。另外为了验证所建立模型的实用性,在此控制系统基础上,将混杂系统的MLD模型应用到了实际工程琼州海峡大桥几根典型斜拉索上,进行了风振动下拉索的参数振动分析。鉴于模型效率的重要性,本论文最后进行了拉索传统空间状态模型和半主动的混合逻辑动态模型执行效率、编程效率和切换效率对比,并对影响模型效率的原因进行初步分析,为后续研究者改善模型效率打下一定的基础。本论文较为成功将拉索半主动控制的MLD模型运用到实际工程,解决了传统理论和模型统一数值分析体系的难题,并首次进行了模型效率的对比及其原因分析。混合逻辑动态理论和模型成功地解决了具有非线性状态离散事件的体系以及其中复杂非线性振动控制方面的难题,土木工程领域引进混杂系统具有重要意义。
[Abstract]:The wind-induced vibration of cable will cause great harm and hidden danger to the construction and normal operation of long-span cable-stayed bridge. In order to solve the problem of wind-induced vibration of cable, In this paper, the vibration control and vibration mechanism of stay cables are studied and explored. In this paper, the hybrid system control theory is introduced from wind induced vibration hazard and cable damper damping effect, and then the hybrid logic dynamic model of semi-active control of cable damper is established on the basis of hybrid system theory research. The model is analyzed by numerical simulation. In addition, in order to verify the practicability of the established model, the MLD model of hybrid system is applied to several typical stayed cables of Qiongzhou Strait Bridge, and the parametric vibration of the cable is analyzed. In view of the importance of model efficiency, in the end of this paper, the performance efficiency, programming efficiency and switching efficiency of the traditional spatial state model and semi-active hybrid logic dynamic model are compared, and the reasons that affect the efficiency of the model are analyzed preliminarily. It lays a foundation for further researchers to improve the efficiency of the model. In this paper, the semi-active control MLD model of cable is successfully applied to practical engineering, which solves the problem of traditional theory and model unified numerical analysis system, and makes the comparison of model efficiency and its cause analysis for the first time. The hybrid logic dynamic theory and model have successfully solved the problems of nonlinear discrete event systems and the complex nonlinear vibration control. The introduction of hybrid systems in civil engineering is of great significance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3
[Abstract]:The wind-induced vibration of cable will cause great harm and hidden danger to the construction and normal operation of long-span cable-stayed bridge. In order to solve the problem of wind-induced vibration of cable, In this paper, the vibration control and vibration mechanism of stay cables are studied and explored. In this paper, the hybrid system control theory is introduced from wind induced vibration hazard and cable damper damping effect, and then the hybrid logic dynamic model of semi-active control of cable damper is established on the basis of hybrid system theory research. The model is analyzed by numerical simulation. In addition, in order to verify the practicability of the established model, the MLD model of hybrid system is applied to several typical stayed cables of Qiongzhou Strait Bridge, and the parametric vibration of the cable is analyzed. In view of the importance of model efficiency, in the end of this paper, the performance efficiency, programming efficiency and switching efficiency of the traditional spatial state model and semi-active hybrid logic dynamic model are compared, and the reasons that affect the efficiency of the model are analyzed preliminarily. It lays a foundation for further researchers to improve the efficiency of the model. In this paper, the semi-active control MLD model of cable is successfully applied to practical engineering, which solves the problem of traditional theory and model unified numerical analysis system, and makes the comparison of model efficiency and its cause analysis for the first time. The hybrid logic dynamic theory and model have successfully solved the problems of nonlinear discrete event systems and the complex nonlinear vibration control. The introduction of hybrid systems in civil engineering is of great significance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3
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